Wheel of a baby walking cart

Abstract

A wheel for a baby walking cart has wheel parts fitted to two sides of a support member with an axle being passed through the central holes of the wheel parts and an elongated hole of the support member. The axle is also passed through a tubular slide member, which is movably received in the elongated hole, and biased towards a front end of the elongated hole by an elastic member. The wheel members have wavy slowing-down portions on inner circular surfaces. The elastic member acts against a force caused by the forward movement of the cart to push the wheel members towards the rear end of the elongated hole for keeping the wavy portions off slowing-down rods of the support member when the cart is moved along. When the cart is moved along too fast, the wheel members are forced to move towards the rear end of the elongated hole for the wavy portions to contact the slowing-down rods to slow down the cart.

What is claimed is:  
     
       1. A wheel for a baby walking cart, comprising 
       a support member connected to a lower part of said walking cart; said support member having an elongated hole;  
       two wheel members, said wheel members being disposed on a respective side of said support member, turnable on an axle passed through said elongated hole of said support member;  
       a tube-shaped slide member movably disposed in said elongated hole of said support member with said axle being passed therethrough; an elastic member being connected to a rear end of said elongated hole and a rear part of said slide member from two ends for biasing said slide member and said wheel members towards a front end of said elongated hole; and characterized by wavy slowing-down portions formed on an inner circular surface of each of said wheel members; said elastic member acting against a force resulting from a forward movement of said walking cart to force said wheel members to move rearwards for keeping said wavy slowing-down portions of said wheel members off slowing-down rods sticking out from two sides of said support member when a speed of said cart is lower than a amount; said force moving said wheel members towards said rear end of said elongated hole when a speed of cart exceeds said amount, making said wavy slowing-down portions contact said slowing-down rods of said support member to slow down said wheel members.  
     
     
       2. The wheel for a baby walking cart as claimed in  claim 1 , wherein said wheel members each has an inner wheel part having said wavy slowing-down portions, and an outer wheel part; said inner wheel part being fitted into said outer wheel part with connecting protrusions on an outer edge being each connected to a corresponding one of connecting gaps on an inner circular surface of said outer wheel part. 
     
     
       3. The wheel for a baby walking cart as claimed in  claim 1 , wherein said tube-shaped slide member has a first tube-shaped slide part, and a second tube-shaped slide part fitted into said first slide part; said first and second slide parts each has a rim fitted onto one of annular recess portions formed on edges of said elongated hole of said support member.